Definition of toll. 1  transitive verb. 2  1 : to sound (a bell) by pulling the rope. 3  2a : to give signal or announcement of the clock tolled each hourb : to announce by tolling church bells tolled the death of the bishopc : to call to or from a place or occasion bells tolled the congregation to church.  intransitive verb.
The formula that this water intake calculator uses is that for every pound of body weight you need 0.5 ounces of fluid intake per day. Therefore if your body weight is 200 Pounds, you would need 100 ounces of fluid.
This comes to a total of 2000 ml (2 litres) to 2500 ml (2.5 litres) or about 8 to 10 cups per day, give or take. Output. Water is lost through normal physiological activities: respiration (breathing) and perspiration [we lose about 500 ml to 650 ml, or just over 2 cups, per day]